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19-01-2022 02:24

Zuidland Peter

Hello all,I have found this erumpant only on Olear

19-01-2022 02:21

Zuidland Peter

Hello all,I have found this erumpant only on Olear

27-01-2019 00:41

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

16-01-2022 15:10

William de Jong

Hi everyone,Found on a cone of Picea abies by Fran

16-01-2022 21:25

Robin Isaksson Robin Isaksson

Spores 10-15 x 1,8-2,3um Found on apel twig today

16-01-2022 00:16

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos.Subo unas fotos de un Ascobolus que h

17-01-2022 13:20

Castillo Joseba Castillo Joseba

Me mandan el materila seco,  recolectado en tallo

16-01-2022 18:26

Niek Schrier

Hi everyone,I found a (lichenicolous?) fungi growi

16-01-2022 22:08

Jonah Benningfield

Hello,I was hoping to get some feedback on this As

16-01-2022 18:00

Riet van Oosten Riet van Oosten

Hello, Found 14-01-2022 on a dead stem of Rubus f

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Nectria on algae/walls
Jannes Jannes Boers, 23-11-2021 20:52
Hello Everyone,

The passed year there have been some interesting collections of Nectriaceae species inhabiting algae on marl-like walls and marl rock faces (so far two different species). It seems there isn't any sufficient literature on the internet which mention this perticulair substrate for a species (atleast I can't find it :)). Hopefully there is someone here who knows more about these obscure species with this peculiar habitat. I will give some quick measurements on one of the species.

Perithecia attached to the substrate with an arachnoid subiculum and up to 225 um in diameter. Asci 8-spored, 60 - 72 x 12,5 - 15 um. Ascospores smooth, hyaline, guttulated, 1-septated, slightly constricted at the septa, 14 - 16 x 7 - 7,5 (-8) um.

This species grew at the base on the northside of an old church, on moist spots covered with algae and Tortula muralis. The fungus seems to be parasitic on the algae and not on the bryophyte.

I've added a link in my message which direct to the photographs:

Looking forward to your opinions.

Kind regards,

Jannes Boers
Franz Berger, 23-11-2021 23:00
Franz Berger
Re : Nectria on algae/walls
You might compare with the description of Pronectria algicola Von drei, Naumovich & Khodos. In Nova Hedwigia 95: 211-220 (2012)spures in Your description are somewhat thicker

P.a. is only known from the Type locality in Czech Rep..

Good luck!

Yours, Franz Berger
Jannes Jannes Boers, 23-11-2021 23:11
Re : Nectria on algae/walls
Thank you very much for your message Franz! It was one of the things that I did find information about :).

It is as you mentioned that the ascospores in this collection are a little bit broader compared to P.algicola. Also P.algicola hyphae and perithecia should be more immersed in the substrate/host.

At first, in the field,  I thought that it was Paranectria oropensis, which has the same superficial mycelium, but ascospores are clearly different. 

Kind regards,

Jannes Boers
Georges Greiff, 25-11-2021 13:56
Re : Nectria on algae/walls

It seems that the collection may have Ilyonectria (Neonectria)-like conidia (normal and macroconidia) based on some of the photos in the link. I have found the anamorpha of an Ilyonectria-like species on various bryophytes for years but have gotten nowehere with the ID. To me, your collection looks similar and may represent one of these apparent generalist necrotrophic fungi but as you say, not much is known about them. - it looks rather similar to this, for example.

All the best,
  • message #70809
Jannes Jannes Boers, 25-11-2021 16:27
Re : Nectria on algae/walls
Hi George,

Thank you for your response! That is an interesting collection! Both of our specimens resemble some kind of Cylindrocarpon. But there are many species/genera which form these anamorphs and they all seem to look very similair. DNA is probably needed to be sure to determine if this is the same fungus.  

I've sent this specimen to Pedro Crous about two months ago, and it is currently growing in culture. So somewhere in the future we'll know more about its identity :). I can share the results here if you are interested?

Best wishes,

Georges Greiff, 25-11-2021 16:29
Re : Nectria on algae/walls
That would be great, Jannes. I sent mine to Pedro as well, but unfortunately it failed in culture. I may try again - would be nice to get answers for these. Great find!